Query Array of IDs in MVC Controller

Question

I got an error message when I tried to query array of IDs in controller action. Here is the error message: string[] does not contain a definition for "contains" and the best extension method overload 'Queryable.contains, Guid)' requires a receiver of type ''. My code is:

public ActionResult GetNews(string[] IDs)
{
    using (DataContext db = new DataContext())
    {  
        var qry = db.News.Where(x => IDs.Contains(x.ID)).ToList();
        ...
    }
}

There is a red line under IDs. IDs is an array passed from View. ID is Guid datatype. Please advice. Thanks.

Why don't you just pass an Guid[] to the action method instead of string[]? — Fran
– Fran, Commented May 31, 2018 at 17:53
It work work with an actual list of IDs instead of your string array: GetNews(string[] IDs) would become GetNews(List<int> IDs)... — Stuart
– Stuart, Commented May 31, 2018 at 18:02

Sandip Kalsariya · Accepted Answer · 2019-12-10 10:25:14Z

1

You need to set id in one list then after you use it same as my code

public ActionResult GetNewsByID(List<int> IDs)
 {
    using (DataContext db = new DataContext())
    {     
        var news= db.News.Where(x => IDs.Contains(x.ID)).ToList();
    }
 }

answered Dec 10, 2019 at 10:25

Sandip Kalsariya

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Comments

user788448 · Accepted Answer · 2018-05-31 18:12:16Z

0

Duh, it works when I change the string[] to Guid[]. Thanks for the responses.

answered May 31, 2018 at 18:12

user788448

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